head to head · open source
olake vs OpenContracts
olake has 1,574 GitHub stars, 273 forks, 178 open issues and last shipped yesterday. OpenContracts has 1,530 stars, 198 forks, 11 open issues and last shipped yesterday. olake leads on adoption by 3% (1,574 vs 1,530 stars). olake is written in Go under Apache-2.0; OpenContracts is written in Python under MIT. olake has attracted 17% as many forks as stars, OpenContracts 13%. OpenContracts was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| olake | OpenContracts | |
|---|---|---|
| GitHub stars | ★ 1.6K | ★ 1.5K |
| License | Apache-2.0 | MIT |
| Written in | Go | Python |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 273 | ⑂ 198 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick olake if
- You weight community size — 1.6K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick OpenContracts if
- You want the OpenContracts feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and OpenContracts fits your workflow better
About olake
OLake Go OLake Go is a high performance, open source data ingestion engine for replicating databases, S3, and Kafka into Apache Iceberg (or plain Parquet). Built for scalable, real time pipelines, OLake Go provides a simple web UI and CLI used to ingest into vendor lock in free Iceberg tables supporting all the query engines/warehouses. Read the docs and benchmarks at olake.io/docs . Join our active community on Slack . [!NOTE] 🎉 OLake Fusion is now live! — Automate your Apache Iceberg Table Maintenance. Check it out here → github.com/datazip inc/olake fusion 🎉 OLake Go — Super fast Sync to Apache Iceberg…
read the full olake overview →
About OpenContracts
OpenContracts (Demo) Open source document intelligence you can build on. Point OpenContracts at a repository of documents and get a programmable citation graph — human annotation, structured extraction, AI agents, and a built in MCP server, all behind one API. Self hosted, MIT licensed, and built for teams working at scale. Same graph, three surfaces: a GraphQL + REST API for your apps, a Model Context Protocol server for your agents, and a React UI for your team. From documents to a citation graph — in about a minute Create a corpus, drop in your documents, and click Set up . That one click installs the…
read the full OpenContracts overview →
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Frequently asked questions
Is olake or OpenContracts more popular?
olake has 1,574 GitHub stars and OpenContracts has 1,530. olake has the larger community by that measure.
Are olake and OpenContracts free?
Both are open source. olake is licensed under Apache-2.0 and OpenContracts under MIT. Neither carries a licence fee.
What is the difference between olake and OpenContracts?
olake is written in Go and OpenContracts in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, olake or OpenContracts?
Choose olake if you want the larger community (1,574 stars) or its Apache-2.0 licence terms. Choose OpenContracts if its feature set, stack or MIT licence fits better. Both are self-hostable.